CVE-2021-33199: Expressionengine

Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days.

In Expression Engine before 6.0.3, addonIcon in Addons/file/mod.file.php relies on the untrusted input value of input->get('file') instead of the fixed file names of icon.png and icon.svg.

Affected products

• Expressionengine Expressionengine: before 6.0.3 (fixed in 6.0.3)

Published 2021-08-12. Last modified 2026-06-17.